Seiko Cal. 6638 - 279

The 6638-279 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 19j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-90a2339f1add]

Also known as: Rally, Crown

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Burgundy

Jewels

19j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1976

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